Sprouts Farmers Market LLC (SFM) had the best month in March 2017 by a large-cap US stock in March 2017, returning 24%.

ASSET	MONTH	% RETURN
Sprouts Farmers Market LLC (SFM)	March 2017	24.03%
Micron Technology (MU)	March 2017	19.62%
Coca-Cola Consolidated (COKE)	March 2017	19.36%
Vertex Pharmaceuticals (VRTX)	March 2017	19.12%
Veeva Systems Inc Class A (VEEV)	March 2017	19.09%
Gold Fields Ltd ADR (GFI)	March 2017	17.05%
Banco Bilbao Viscaya Argentaria SA ADR (BBVA)	March 2017	16.42%
Best Buy (BBY)	March 2017	16.38%
YPF Sociedad Anonima (YPF)	March 2017	15.95%
Murphy USA (MUSA)	March 2017	15.24%
Wynn Resorts (WYNN)	March 2017	14.72%
Canadian Natural Resources (CNQ)	March 2017	13.84%
Ferrari (RACE)	March 2017	13.35%
Shopify (SHOP)	March 2017	13.16%
Jabil Circuit (JBL)	March 2017	12.53%
Deckers Outdoor (DECK)	March 2017	11.67%
Monster Beverage (MNST)	March 2017	11.49%
Logitech International (LOGI)	March 2017	11.24%
America Movil SAB de CV ADR (AMX)	March 2017	11.14%
Darden Restaurants (DRI)	March 2017	10.92%
NRG Energy (NRG)	March 2017	10.91%
Align Technology (ALGN)	March 2017	10.54%
Arista Networks (ANET)	March 2017	10.23%
Pilgrims Pride (PPC)	March 2017	10.16%
Korea Electric Power Corp ADR (KEP)	March 2017	9.68%

Large-cap stocks are treated as having a market cap of $10B+.